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Mountain West Regional Reports

Mountain West: June Garden To-Do List | Regional Report

Mock orange (Philadelphus lewisii, Zones 4-8). Photo: Mary Ann Newcomer

Water all plants deeply but thoroughly, and less often—about 1 inch per week depending on heat and humidity.

Give bees a chance! Maintain a source of drinking water for the pollinators. Birds, bees, and butterflies need a fresh source of water.

Cut back very robust perennials to check their growth, increase their fullness, and delay their bloom time. Joe Pye weed (Eutrochium spp. and cvs., Zones 3–11) and asters (Symphyotrichum spp. and cvs., Zones 4–8) love this treatment, but sedums (Sedum and Hylotelephium spp. and cvs., Zones 3–11) and daylilies (Hemerocallis cvs., Zones 3–10) do not.

Clematis (Clematis cv., Zones 4-9) and verbascum (Verbascum cv., Zones 5-9) blooming in June. Photo: Mary Ann Newcomer

Be vigilant for weeds. If you can keep them from setting seed, you will be ahead of the game.

Stake or support tomatoes, dahlias (Dahlia cvs., Zones 9–11), and other top-heavy plants.

Thin, deadhead, and fertilize container annuals. Annuals are heavy feeders, and watering container plantings will rapidly leach out nutrients.

Mary Ann Newcomer is the author of two books: Rocky Mountain Gardener’s Handbook and Vegetable Gardening in the Mountain States.

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